Seat portion for a chair



FIG. 1 is a front perspective view of a seat portion for a chair, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side elevation view thereof taken from the right of FIG. 2;

FIG. 5 is a side elevation view thereof taken from the left of FIG. 2;

FIG. 6 is top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

I claim, the ornamental design for a seat portion for a chair, as shown and described. 